Under "Limitations", just reading this now: "People who choose to use psychedelics might have better initial mental health before using psychedelics, and peopl

Under "Limitations", just reading this now: "People who choose to use psychedelics might have better initial mental health before using psychedelics, and people who experience problems apparently related to psychedelics may choose to not use them again." Psych ward patients who got there via psychedelics wouldn't be included in the study also. What is written in their abstract seems irresponsible in the extreme, given the above limitations: "We failed to find evidence that psychedelic use is an independent risk factor for mental health problems. Psychedelics are not known to harm the brain or other body organs or to cause addiction or compulsive use; serious adverse events involving psychedelics are extremely rare. Overall, it is difficult to see how prohibition of psychedelics can be justified as a public health measure. "